From a67c21f093202f142438689d3f7cfbdf4ea82eea Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Sun, 28 Oct 2007 19:13:50 +0000 Subject: merge 'lennart' branch back into trunk. git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1971 fefdeb5f-60dc-0310-8127-8f9354f1896f --- src/utils/pasuspender.c | 316 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 316 insertions(+) create mode 100644 src/utils/pasuspender.c (limited to 'src/utils/pasuspender.c') diff --git a/src/utils/pasuspender.c b/src/utils/pasuspender.c new file mode 100644 index 00000000..ae59086b --- /dev/null +++ b/src/utils/pasuspender.c @@ -0,0 +1,316 @@ +/* $Id$ */ + +/*** + This file is part of PulseAudio. + + Copyright 2004-2006 Lennart Poettering + + PulseAudio is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 2 of the License, + or (at your option) any later version. + + PulseAudio is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with PulseAudio; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +#ifdef HAVE_CONFIG_H +#include +#endif + +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#ifdef __linux__ +#include +#endif + +#include +#include + +#if PA_API_VERSION < 10 +#error Invalid PulseAudio API version +#endif + +#define BUFSIZE 1024 + +static pa_context *context = NULL; +static pa_mainloop_api *mainloop_api = NULL; +static char **child_argv = NULL; +static int child_argc = 0; +static pid_t child_pid = (pid_t) -1; +static int child_ret = 0; +static int dead = 1; + +static void quit(int ret) { + pa_assert(mainloop_api); + mainloop_api->quit(mainloop_api, ret); +} + + +static void context_drain_complete(pa_context *c, void *userdata) { + pa_context_disconnect(c); +} + +static void drain(void) { + pa_operation *o; + + if (!(o = pa_context_drain(context, context_drain_complete, NULL))) + pa_context_disconnect(context); + else + pa_operation_unref(o); +} + +static void start_child(void) { + + if ((child_pid = fork()) < 0) { + + fprintf(stderr, "fork(): %s\n", strerror(errno)); + quit(1); + + } else if (child_pid == 0) { + /* Child */ + +#ifdef __linux__ + prctl(PR_SET_PDEATHSIG, SIGTERM, 0, 0, 0); +#endif + + if (execvp(child_argv[0], child_argv) < 0) + fprintf(stderr, "execvp(): %s\n", strerror(errno)); + + _exit(1); + + } else { + + /* parent */ + dead = 0; + } +} + +static void suspend_complete(pa_context *c, int success, void *userdata) { + static int n = 0; + + n++; + + if (!success) { + fprintf(stderr, "Failure to suspend: %s\n", pa_strerror(pa_context_errno(c))); + quit(1); + return; + } + + if (n >= 2) + start_child(); +} + +static void resume_complete(pa_context *c, int success, void *userdata) { + static int n = 0; + + n++; + + if (!success) { + fprintf(stderr, "Failure to resume: %s\n", pa_strerror(pa_context_errno(c))); + quit(1); + return; + } + + if (n >= 2) + drain(); /* drain and quit */ +} + +static void context_state_callback(pa_context *c, void *userdata) { + pa_assert(c); + + switch (pa_context_get_state(c)) { + case PA_CONTEXT_CONNECTING: + case PA_CONTEXT_AUTHORIZING: + case PA_CONTEXT_SETTING_NAME: + break; + + case PA_CONTEXT_READY: + if (pa_context_is_local(c)) { + pa_operation_unref(pa_context_suspend_sink_by_index(c, PA_INVALID_INDEX, 1, suspend_complete, NULL)); + pa_operation_unref(pa_context_suspend_source_by_index(c, PA_INVALID_INDEX, 1, suspend_complete, NULL)); + } else + start_child(); + + break; + + case PA_CONTEXT_TERMINATED: + quit(0); + break; + + case PA_CONTEXT_FAILED: + default: + fprintf(stderr, "Connection failure: %s\n", pa_strerror(pa_context_errno(c))); + + pa_context_unref(context); + context = NULL; + + if (child_pid == (pid_t) -1) + /* not started yet, then we do it now */ + start_child(); + else if (dead) + /* already started, and dead, so let's quit */ + quit(1); + + break; + } +} + +static void sigint_callback(pa_mainloop_api *m, pa_signal_event *e, int sig, void *userdata) { + fprintf(stderr, "Got SIGINT, exiting.\n"); + quit(0); +} + +static void sigchld_callback(pa_mainloop_api *m, pa_signal_event *e, int sig, void *userdata) { + int status = 0; + pid_t p; + + p = waitpid(-1, &status, WNOHANG); + + if (p != child_pid) + return; + + dead = 1; + + if (WIFEXITED(status)) + child_ret = WEXITSTATUS(status); + else if (WIFSIGNALED(status)) { + fprintf(stderr, "WARNING: Child process terminated by signal %u\n", WTERMSIG(status)); + child_ret = 1; + } + + if (context) { + if (pa_context_is_local(context)) { + /* A context is around, so let's resume */ + pa_operation_unref(pa_context_suspend_sink_by_index(context, PA_INVALID_INDEX, 0, resume_complete, NULL)); + pa_operation_unref(pa_context_suspend_source_by_index(context, PA_INVALID_INDEX, 0, resume_complete, NULL)); + } else + drain(); + } else + /* Hmm, no context here, so let's terminate right away */ + quit(0); +} + +static void help(const char *argv0) { + + printf("%s [options] ... \n\n" + " -h, --help Show this help\n" + " --version Show version\n" + " -s, --server=SERVER The name of the server to connect to\n\n", + argv0); +} + +enum { + ARG_VERSION = 256 +}; + +int main(int argc, char *argv[]) { + pa_mainloop* m = NULL; + int c, ret = 1; + char *server = NULL, *bn; + + static const struct option long_options[] = { + {"server", 1, NULL, 's'}, + {"version", 0, NULL, ARG_VERSION}, + {"help", 0, NULL, 'h'}, + {NULL, 0, NULL, 0} + }; + + if (!(bn = strrchr(argv[0], '/'))) + bn = argv[0]; + else + bn++; + + while ((c = getopt_long(argc, argv, "s:h", long_options, NULL)) != -1) { + switch (c) { + case 'h' : + help(bn); + ret = 0; + goto quit; + + case ARG_VERSION: + printf("pasuspender "PACKAGE_VERSION"\nCompiled with libpulse %s\nLinked with libpulse %s\n", pa_get_headers_version(), pa_get_library_version()); + ret = 0; + goto quit; + + case 's': + pa_xfree(server); + server = pa_xstrdup(optarg); + break; + + default: + goto quit; + } + } + + child_argv = argv + optind; + child_argc = argc - optind; + + if (child_argc <= 0) { + help(bn); + ret = 0; + goto quit; + } + + if (!(m = pa_mainloop_new())) { + fprintf(stderr, "pa_mainloop_new() failed.\n"); + goto quit; + } + + pa_assert_se(mainloop_api = pa_mainloop_get_api(m)); + pa_assert_se(pa_signal_init(mainloop_api) == 0); + pa_signal_new(SIGINT, sigint_callback, NULL); + pa_signal_new(SIGCHLD, sigchld_callback, NULL); +#ifdef SIGPIPE + signal(SIGPIPE, SIG_IGN); +#endif + + if (!(context = pa_context_new(mainloop_api, bn))) { + fprintf(stderr, "pa_context_new() failed.\n"); + goto quit; + } + + pa_context_set_state_callback(context, context_state_callback, NULL); + pa_context_connect(context, server, PA_CONTEXT_NOAUTOSPAWN, NULL); + + if (pa_mainloop_run(m, &ret) < 0) { + fprintf(stderr, "pa_mainloop_run() failed.\n"); + goto quit; + } + +quit: + if (context) + pa_context_unref(context); + + if (m) { + pa_signal_done(); + pa_mainloop_free(m); + } + + pa_xfree(server); + + if (!dead) + kill(child_pid, SIGTERM); + + return ret == 0 ? child_ret : ret; +} -- cgit